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Wind resources and wind farm wake effects offshore observed from satellite

Wind resources and wind farm wake effects offshore observed from satellite. Charlotte Bay Hasager Poul Astrup Merete Bruun Christiansen Morten Nielsen Rebecca Barthelmie Risø National Laboratory, Wind Energy Department. Motivation. Satellite data are complementary to:

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Wind resources and wind farm wake effects offshore observed from satellite

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  1. Wind resources and wind farm wake effects offshore observed from satellite Charlotte Bay Hasager Poul Astrup Merete Bruun Christiansen Morten Nielsen Rebecca Barthelmie Risø National Laboratory, Wind Energy Department

  2. Motivation Satellite data are complementary to: offshore in-situ data……….that are costly offshore model results…….that are not fully verified EWEC 2006, Athens 27 February to 2 March 2006

  3. 1800 km 400 km 100 km EWEC 2006, Athens 27 February to 2 March 2006

  4. Physics Ocean surface is roughened by wind interaction such that capillary and short gravity waves are generated. More wind causes more steep waves that causes higher backscatter. EWEC 2006, Athens 27 February to 2 March 2006

  5. Horns Rev, Elsam A/S Courtesy: NOAA EWEC 2006, Athens 27 February to 2 March 2006

  6. EWEC 2006, Athens 27 February to 2 March 2006

  7. QuikScat Mean wind speed 5 years Grid cell: ca. 25 km Number of observations: 3650 (twice per day for 5 years) EWEC 2006, Athens 27 February to 2 March 2006

  8. QuikScat North EWEC 2006, Athens 27 February to 2 March 2006

  9. QuikScat East EWEC 2006, Athens 27 February to 2 March 2006

  10. QuikScat South EWEC 2006, Athens 27 February to 2 March 2006

  11. QuikScat West Weibull A and k per sector in WASP tab-file format available EWEC 2006, Athens 27 February to 2 March 2006

  12. Horns Rev, Elsam A/S Wind field from Envisat ASAR WSM (Courtesy: JHU/APL) EWEC 2006, Athens 27 February to 2 March 2006

  13. EWEC 2006, Athens 27 February to 2 March 2006

  14. EWEC 2006, Athens 27 February to 2 March 2006

  15. Envisat processed at JHU/APL EWEC 2006, Athens 27 February to 2 March 2006

  16. EWEC 2006, Athens 27 February to 2 March 2006

  17. Horns Rev (Denmark) ERS Mean wind speed for 30 daysGrid cell: 400 m 5 km From Nielsen et al. 2004, Risø-R-1479(EN) EWEC 2006, Athens 27 February to 2 March 2006

  18. Directions from met. mast Directions from image, LG supervised U = 7.3 m/s E = 421 W/m2 U = 7.8 m/s E = 496 W/m2 91 SAR wind maps In situ measurements (Sommer, 2003): U = 7.6 m/s E = 422 W/m2 Directions from image, LG automatic U = 7.7 m/s E = 510 W/m2 EWEC 2006, Athens 27 February to 2 March 2006

  19. EWEC 2006, Athens 27 February to 2 March 2006

  20. Wind farm sites Blaavandshuk Met. mast Horns Rev Offshore Wind Farm N ERS (no wind) EWEC 2006, Athens 27 February to 2 March 2006

  21. Wind farm Wind farm wake effects Reduced mean wind speed Enhanced turbulence ERS Horns Rev EWEC 2006, Athens 27 February to 2 March 2006

  22. Y X x y EWEC 2006, Athens 27 February to 2 March 2006

  23. Wind Met. mast 5 flight tracks in C-band VV Airborne SAR (E-SAR) 12 October 2003 EWEC 2006, Athens 27 February to 2 March 2006

  24. Winds from E-SAR in CVV Wind farm Wind farm Wind Wind Wind speed Velocity deficit EWEC 2006, Athens 27 February to 2 March 2006

  25. Christiansen & Hasager (2006), Using airborne SAR for wake mapping offshore. Wind Energy (in press). EWEC 2006, Athens 27 February to 2 March 2006

  26. Conclusions Wind resources can be estimated from satellite wind maps as a supplement to in-situ data. Wake velocity deficit can be quantified from satellite wind maps. Acknowledgements: Danish Research Agency SAT-WIND and SAR-WAKE projects; ESA EO-windfarm and EO-1356 projects; Elsam A/S Meteorological data. EWEC 2006, Athens 27 February to 2 March 2006

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